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Fluke 164 Counter Demo Aid
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sambonator:
I found an interesting 1979 relic from Fluke.

From what I gather from the markings, it appears to be a signal generator for frequency counter product demonstrations.
It can be AC powered or powered by its internal 4 D cell NiCD batteries. 

It just takes unscrewing 1 screw to slide the entire unit out of the case.  Accepts 115V or 230V via switch on the board.

Sorry about the poor smartphone pics!   



sambonator:
Here are the internals.
The 4 NiCd D cells have shrink wrap around them, along with cardboard protectors to protect the board from battery leakage.

sambonator:
Non-custom IC's, standard GE NiCD D Cells.  Looks good for 40+ yrs old.
sambonator:
Cool thing is, it still works, as a Fluke should  ;D
sambonator:
Scope readings, from left to right BNCs, going through each setting.  The knobs were set to top dead center.
(sorry I'm still a scope noob)
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